The membership of the House of Commons Reform Committee in the previous Parliament was as follows:
| Member | Constituency | Party |
|---|
| Dr Tony Wright MP (Chairman) | Cannock Chase | Labour |
| Mr Graham Allen MP | Nottingham North | Labour |
| Mr Peter Atkinson MP | Hexham | Conservative |
| Mr Clive Betts MP | Sheffield, Attercliffe | Labour |
| Mr Graham Brady MP | Altrincham & Sale West | Conservative |
| Mr David Clelland MP | Tyne Bridge | Labour |
| Mr David Drew MP | Stroud | Labour Co-op |
| Mrs Natascha Engel MP | North East Derbyshire | Labour |
| Dr Evan Harris MP | Oxford West & Abingdon | Liberal Democrats |
| David Howarth MP | Cambridge | Liberal Democrats |
| Rt Hon Michael Jack MP | Fylde | Conservative |
| Rt Hon Greg Knight MP | East Yorkshire | Conservative |
| Mr Elfyn Llwyd MP | Meirionnydd Nant Conwy | Plaid Cymru |
| Mr Chris Mullin MP | Sunderland South | Labour |
| Dr Nick Palmer MP | Broxtowe | Labour |
| Martin Salter MP | Reading West | Labour |
| Dr Phyllis Starkey MP | Milton Keynes South West | Labour |
| Mr Andrew Tyrie MP | Chichester | Conservative |